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CVE-2026-26740

HIGH CVSS 3.1: 8.2 EPSS 0.15%
Updated Mar 21, 2026
Giflib_Project
Parameter Value
CVSS 8.2 (HIGH)
Type CWE-787 (Out-of-bounds Write)
Vendor Giflib_Project
Public PoC Yes

Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Giflib_Project Giflib
cpe:2.3:a:giflib_project:giflib:5.2.2:*:*:*:*:*:*:*